Orr, M. A. (Mary Acworth) · London and Edinburgh, Gall and Inglis · leaf 122
much more difficult toarrange. Eudoxus used four spheres for each, andthese had in every case to be carefully adjusted tothe very different periods and amplitudes of the 90 EUDOXUS. planetary oscillations. It must be confessed that thescheme failed with the difficult case of Mars, and wasnot quite… … Fig. 19, The spheres of the sun in the system of Eudoxus. The outer sphere turns on its axis A A in a day and night; the inner on its axis a a in a year, in the opposite direction. it merely as the solution of a mathematical problem,or as an embodiment of astronomical knowledore. Theperiods of the…
Dante Alighieri, 1265-1321 · Astronomy, Ancient · Astronomy, Medieval · Early maps
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
